That's mostly thanks to its leader, Gandhi, who gets lots of faith bonuses just for meeting new Civs and not waging war with them. India looks like a solid choice if you're going the religious route. Civ 6: Gandhi can lead you to Religious Victory So what's the best option for winning a religious victory? There isn't one clear choice, but we do have a few suggestions. You'll also rely on the special abilities of your civilization and leader to beef up your faith. To do that you'll use Missionaries and Apostles, a new unit that functions almost exactly like the Great Prophets did in Civ 5, to spread your religion far and wide.
All you have to do is convert over 50% of the cities in every other civilization in the game to your religion.
Scoring a Religious Victory is pretty straightforward in Civ 6. Here's how to score a Religious Victory - and the Civs that will get you there. This time around, you can beat your enemies by converting them to your religion, which opens up some dynamic new strategies for world domination - especially in the Civs whose unique bonuses give them boosts to both religious fervor and war. But perhaps the most interesting of the additions is the new Religious Victory option. Civilization 6 is packed with new features and mechanics that have fans of the previous game chomping at the bit to try out.